The Best Ways to Use Renewable Energy

Geothermal Power (12/13)

The Blue Lagoon hot springs near Reykjavik, Iceland, with a thermal electricity plant in the background. Iceland uses its natural, hot, mineral-rich water caused by volcanic activity to power local industry and heat and provide electricity to most homes around Reykjavik. Geothermal power, however, is not strictly renewable as hot water cools down over time. (Photo: Reuters)